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Gearbox Syncro Ring / Brake Band / Dog Teeth
By OE Match
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
This OE Match synchroniser ring is a direct-fit replacement for the 1st/2nd gear synchro teeth in Porsche G50 (or G-series) manual transmissions. It is built to the correct dimensions, materials, and tolerances for reliable gear engagement and longevity.
Fits:
Porsche 911 / 964 / 965 (1987 - 1994) - G50 - 1st - 2nd Gear
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421010
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
| Synchro Gear Teeth 911 1987-94 3rd-5th Gears |
Fits:
Porsche 911 / 964 / 965 (87-94) - G50 - 3rd - 5th Gear
Manual transmission
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830420910
The product you are viewing cross references to these numbers
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Fits:
Porsche 911 (964) Carrera 2 RS 1992 G50.10
Diagram ref no 31
Price is for each.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95030431130
The product you are viewing cross references to these numbers
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 993 (911) RS 1994-97
The OE Match Synchroniser Ring is a replacement manual-transmission synchroniser component designed for the 3rd / 4th gear synchromesh assembly on selected Porsche G50 gearboxes.
Price Shown Is For Each.
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 993 (911) RS 1994-97
Diagram Ref No 7
The synchroniser ring is positioned inside the gearbox and plays an essential role in allowing smooth gear engagement. Before the selected gear engages, the synchroniser helps equalise the rotational speeds of the gear and transmission shaft, reducing the likelihood of gear clash or grinding.
This OE Match replacement is suitable for gearbox rebuilding or repair where the original synchroniser ring has become worn, glazed, scored or damaged.
What This Product Does:
During a manual gear change, the gearbox components involved are rotating at different speeds.
The synchroniser system brings these speeds together before the gear teeth fully engage.
The synchroniser ring helps:
- Match gear and shaft rotational speeds
- Allow smoother 3rd and 4th gear engagement
- Reduce gear grinding during shifts
- Reduce shock loading on transmission components
- Protect engagement teeth and synchroniser hubs
- Improve shift quality
- Provide more consistent manual gearbox operation
Without an effective synchroniser, the driver may need to apply greater force to select the gear, and the engagement teeth can begin to clash before their speeds have equalised.
Symptoms Of Wear Or Failure:
Synchroniser rings are friction components and naturally wear over time through repeated gear changes.
Common symptoms of a worn 3rd or 4th gear synchroniser can include:
- Grinding when selecting 3rd gear
- Grinding when selecting 4th gear
- Difficult or reluctant gear engagement
- Notchy gear changes
- Increased effort required at the gear lever
- Gear engaging more easily when shifted slowly
- Gear clash during fast shifts
- Poor shifting when the gearbox is cold
- Difficulty downshifting into 3rd or 4th
- Improved shifting when double-declutching
- Metallic noise during gear engagement
- Visible scoring or wear on the synchroniser ring during gearbox inspection
- Rounded, damaged or worn engagement surfaces
Similar symptoms can also be caused by worn dog teeth, selector components, bearings, shift linkage or clutch problems, so the transmission should be properly diagnosed before dismantling.
Why Replacement Matters:
A worn synchroniser ring cannot effectively equalise the speeds of the gearbox components before engagement.
As wear progresses, the driver may experience increasingly difficult or noisy shifts.
Continuing to use a badly worn synchroniser can contribute to damage to:
- Gear engagement teeth
- Synchroniser hubs
- Sliding sleeves
- Dog teeth
- Selector components
- Associated gearbox parts
Replacing the worn ring during a gearbox rebuild helps restore smooth synchronisation and reduces the risk of damaging more expensive transmission components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421130
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Synchro Ring – 3rd / 4th /
5th & Reverse Gear
Sold each - 4 required per car
Restore the smooth, precise gear changes your Porsche was
designed to deliver with this OE Match Synchro Ring for the Porsche 964 manual
gearbox. Manufactured to the original factory specification,
this helps provide accurate synchronisation
and helping restore crisp, positive gear engagement.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Diagram Ref no 7
Each Porsche 964 manual gearbox uses four of these synchroniser rings, one for 3rd gear, 4th gear, 5th gear and reverse gear. Whether you're carrying out a complete transmission overhaul or replacing worn synchroniser components, this OE Match synchro ring offers factory-style fit, performance and durability.
What Does the Synchro Ring Do?
The synchro ring is a critical wear component within the manual transmission synchroniser assembly.
Its primary functions include:
- Synchronising the rotational speed of the selected gear and gearbox shaft before engagement.
- Allowing smooth, quiet gear changes without gear clash.
- Reducing wear on gear teeth, selector sleeves and synchroniser hubs.
- Improving shift quality and gear engagement.
- Protecting expensive internal gearbox components from premature wear.
- Maintaining the refined shifting performance expected from the Porsche 964 manual transmission.
A correctly functioning synchroniser ring is essential for smooth, accurate and reliable gear changes.
Why Do Synchro Rings Wear Out?
Synchroniser rings are designed to wear gradually during normal operation.
Common causes of wear include:
- High mileage.
- Frequent gear changes.
- Aggressive driving or rapid shifting.
- Worn or contaminated gearbox oil.
- Excessive gearbox temperatures.
- Wear to associated synchroniser hubs and selector sleeves.
- General fatigue of the friction surface over time.
As the friction material wears, the synchroniser becomes less effective at matching gear speeds, leading to more difficult gear selection and increased gearbox wear.
When Should the Synchro Ring Be Replaced?
Replacement is recommended when:
- Gear changes become stiff or notchy.
- Grinding or crunching occurs when selecting gears.
- The gearbox is stripped for overhaul.
- The synchroniser ring shows visible wear or damage.
- Replacing synchroniser hubs, selector sleeves or bearings.
- Rebuilding a high-mileage transmission.
- Preparing a gearbox for fast road or performance use.
Because gearbox disassembly is required, replacing all worn synchroniser rings during a rebuild is considered best practice.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92830421105
The product you are viewing cross references to these numbers
OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth — Engagement, Smoothness, Control
OEMatch gearbox synchroniser parts are practical replacements designed for Porsche models. Synchro rings, brake bands and dog teeth restore accurate gear engagement during a rebuild or repair, reduce grinding and improve shift clarity. These items are chosen for compatibility with model-specific transmission layouts and common Porsche gearbox applications.
Available Types
- Synchro rings for specific gearsets and ratios
- Brake bands sized for particular Porsche manual transmissions
- Dog rings and dog teeth for hub engagement and selector assemblies
Understanding OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original gearbox synchroniser parts.
OE (Original Equipment) refers to parts matching original specifications for the gearbox synchroniser parts and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM gearbox synchroniser parts engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Synchroniser rings, brake bands and dog teeth coordinate rotational speed and positive engagement between gears; correct selection and installation support consistent shift feel and reduce the risk of incidental damage during use or rebuild. Material choice and heat treatment affect wear rates and contact behaviour, so matching part type to the transmission model is important.
Benefits Include
- Restores synchronisation to reduce gear noise and grinding
- Protects adjacent gearbox components by ensuring controlled engagement
- Helps maintain consistent shift effort across gears and driving conditions
Why Gearbox Syncro Ring / Brake Band / Dog Teeth Wear and Fail
- Friction surface wear from age, contamination or degraded lubricant
- Deformation or chipping of dog teeth due to aggressive shifting or impact
- Heat stress and inadequate lubrication during high-load operation
The Importance of Replacing with OEMatch Gearbox Syncro Ring / Brake Band / Dog Teeth
Replacing worn synchroniser components as part of a transmission rebuild or service reduces the likelihood of further gearbox damage and helps retain intended shift characteristics. Using parts matched to the Porsche transmission maintains mechanical clearances and engagement timing, supporting dependable operation and reducing the chance of secondary failure.
Advantages
- Replacements sized for common Porsche transmission types to aid fitment
- Heat-treated and machined materials for consistent contact behaviour
- Suitable for restorations, routine servicing and compatible performance upgrades
Support & Advice
Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If you are unsure about setup, condition or backlash settings, consult a specialist with Porsche experience.
